Road Stream Crossing Site PLT-B-2

Platte River Watershed
Platte Rd
Benzonia Twp, Benzie County
Information collected by:
Site Location
GPS Coordinates: 44.66786 , -86.04813
T26N R14W Sec 7
Owned by Private
Fact Sheet
Structure is NOT Perched
Total Erosion: 0.7014 tons/year
Severity: Restored
Year Inventoried: 2015
Site ID
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Pipe Arch
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Mixture
General Conditions: New
Structure Interior: corrugated
Dimensions of Structure: Length 66 ft. , Width 8 ft. , Height 5.5 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 0.9 ft.
Embedded Depth of Structure: 0.3 ft.
Water Velocity*: 1.5 ft./sec.
Structure Outlet
Water Depth: 1.1 ft.
Embedded Depth of Structure: 0.7 ft.
Water Velocity*: 1.6 ft./sec.
*Water Velocities were measured 0.7 ft. below Surface (with Meter)
Additional Comments

CRA assisted with installation summer 2014.

Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 0 ft. , Width 0 ft. , Depth 0 ft.
Upstream Pond: Length 0 ft. , Width 0 ft. , Depth 0 ft.
Riffle Information
Water Depth: 0.6 ft.
Bankfull Width: 12 ft.
Wetted Width: 6 ft.
Water Velocity: 0.8 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved County Road
Road Condition: Good
Road Width at Culvert: 34 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 1.2 ft.
Slope: More than 1:2
Downstream
Fill Depth: 1.8 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 600 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.52
Erosion: 0.3507 tons/year
Right Approach
Length: 600 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.52
Erosion: 0.3507 tons/year
Erosion Information
Total Erosion at Crossing: 0.7014 tons/year
Extent of Erosion: Moderate
Summary Information
Erosion is an area of concern for this site.

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